1400442220 has 24 divisors (see below), whose sum is σ = 2981218464. Its totient is φ = 552502656.

The previous prime is 1400442217. The next prime is 1400442259. The reversal of 1400442220 is 222440041.

It is a super-2 number, since 2×1400442220² = 3922476823117056800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478144 + ... + 481063.

It is an arithmetic number, because the mean of its divisors is an integer number (124217436).

Almost surely, 2^1400442220 is an apocalyptic number.

1400442220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400442220 is an abundant number, since it is smaller than the sum of its proper divisors (1580776244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1400442220 is a wasteful number, since it uses less digits than its factorization.

1400442220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959289 (or 959287 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 1400442220 is about 37422.4828144793. The cubic root of 1400442220 is about 1118.8067169731.

Adding to 1400442220 its reverse (222440041), we get a palindrome (1622882261).

The spelling of 1400442220 in words is "one billion, four hundred million, four hundred forty-two thousand, two hundred twenty".